[PATCH 0/3] explicit_bzero v6

[Zack Weinberg <zackw at panix dot com>]

This contains the revised documentation discussed earlier, and an
improved test that doesn't use signal stacks (it uses swapcontext
instead, and does no printing on the alternate stack, so we don't need
a printf wrapper anymore) (I thought about using pthreads instead of
the POSIX-obsolesced swapcontext, but then I'd have had to figure out
how to get random tests in string/ linked with libpthread).

There is no mangling of the public symbol name.  As with
getentropy/getrandom, I'm OK with adding mangling if archive rebuilds
indicate a problem.

I'm going to be out of town for the last two weeks of December, so I
would like a go/no-go decision on the inclusion of explicit_bzero for
2.25 as soon as possible.

zw

Zack Weinberg (3):
  New string function explicit_bzero (from OpenBSD).
  Add fortification and inline optimization of explicit_bzero.
  Use explicit_bzero where appropriate

 NEWS                                               |   6 +
 crypt/crypt-entry.c                                |  11 +
 crypt/md5-crypt.c                                  |   8 +-
 crypt/sha256-crypt.c                               |  14 +-
 crypt/sha512-crypt.c                               |  14 +-
 debug/tst-chk1.c                                   |  28 ++
 include/string.h                                   |  12 +
 manual/string.texi                                 | 101 +++++++
 string/Makefile                                    |  12 +-
 string/Versions                                    |  10 +
 string/bits/string2.h                              |  11 +
 string/bits/string3.h                              |   8 +
 string/explicit_bzero.c                            |  33 +++
 string/read_memory.c                               |  41 +++
 string/string.h                                    |   9 +
 string/test-explicit_bzero.c                       |  20 ++
 string/test-memset.c                               |  10 +-
 string/tst-xbzero-opt.c                            | 289 +++++++++++++++++++++
 sysdeps/arm/nacl/libc.abilist                      |   3 +
 sysdeps/unix/sysv/linux/aarch64/libc.abilist       |   3 +
 sysdeps/unix/sysv/linux/alpha/libc.abilist         |   3 +
 sysdeps/unix/sysv/linux/arm/libc.abilist           |   3 +
 sysdeps/unix/sysv/linux/hppa/libc.abilist          |   3 +
 sysdeps/unix/sysv/linux/i386/libc.abilist          |   3 +
 sysdeps/unix/sysv/linux/ia64/libc.abilist          |   3 +
 sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist |   3 +
 sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist   |   3 +
 sysdeps/unix/sysv/linux/microblaze/libc.abilist    |   3 +
 .../unix/sysv/linux/mips/mips32/fpu/libc.abilist   |   3 +
 .../unix/sysv/linux/mips/mips32/nofpu/libc.abilist |   3 +
 .../unix/sysv/linux/mips/mips64/n32/libc.abilist   |   3 +
 .../unix/sysv/linux/mips/mips64/n64/libc.abilist   |   3 +
 sysdeps/unix/sysv/linux/nios2/libc.abilist         |   3 +
 .../sysv/linux/powerpc/powerpc32/fpu/libc.abilist  |   3 +
 .../linux/powerpc/powerpc32/nofpu/libc.abilist     |   3 +
 .../sysv/linux/powerpc/powerpc64/libc-le.abilist   |   3 +
 .../unix/sysv/linux/powerpc/powerpc64/libc.abilist |   3 +
 sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist  |   3 +
 sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist  |   3 +
 sysdeps/unix/sysv/linux/sh/libc.abilist            |   3 +
 sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist |   3 +
 sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist |   3 +
 .../sysv/linux/tile/tilegx/tilegx32/libc.abilist   |   3 +
 .../sysv/linux/tile/tilegx/tilegx64/libc.abilist   |   3 +
 sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist  |   3 +
 sysdeps/unix/sysv/linux/x86_64/64/libc.abilist     |   3 +
 sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist    |   3 +
 47 files changed, 702 insertions(+), 22 deletions(-)
 create mode 100644 string/explicit_bzero.c
 create mode 100644 string/read_memory.c
 create mode 100644 string/test-explicit_bzero.c
 create mode 100644 string/tst-xbzero-opt.c

-- 
2.11.0